Add FunctionMaterialLogic and FunctionMaterialUpdateStrategy, run function material "Show diagram".

StructureHelperLogics/Models/Materials/Logics/IFunctionMaterialLogic.cs

@@ -0,0 +1,15 @@
+using LoaderCalculator.Data.Materials;
+using StructureHelperCommon.Infrastructures.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.Models.Materials.Logics
+{
+    internal interface IFunctionMaterialLogic
+    {
+        IMaterial GetLoaderMaterial(IFunctionMaterial material, LimitStates limitState, CalcTerms calcTerm, double factor = 1d);
+    }
+}